A self-shielding flux-cored welding wire for high-nitrogen armor steel suitable for all-position welding

Abstract

The invention relates to a self-shielded flux-cored wire (welding wire for short) for high nitrogen armor steel and suitable for all-position welding. According to the technical scheme, the welding wire is composed of a steel strip and cored powder. The steel strip and the cored powder sequentially account for 76 wt% to 77wt% and 23wt% to 24wt% of the welding wire. The steel strip comprises chemical components including 0.01 to 0.05 wt% of C, 0.50 to 1.50 wt% of Si, 4.00 to 16.00 wt% of Mn, 10.00 to 17.00 wt% of Cr, not larger than 0.002 wt% of P, not larger than 0.003 wt% of S, and the balance Fe and inevitable impurities; the chemical components of the cored powder comprise 27 to 33wt% of barium fluoride, 4 to 7wt% of lithium fluoride, 2 to 3 wt% of potassium fluoroaluminate, 13 to 16 wt% of chromium nitride, 10 to 12 wt% of magnalium, 5 to 8 wt% of magnesium powder, 20 to 22 wt% of manganese powder, 8 to 10 wt% of nickel powder and the balance iron powder. During welding, the electric arc is stable, the forming is good, all-position welding is achieved, and high strength, high ductility and toughness needs and outdoor rapid repairing needs of the new-generation armored vehicle can be met.

Description

Technical field: [0001] The invention belongs to the technical field of self-protecting flux-cored welding wires for high-nitrogen armored steel. In particular, it relates to a self-shielded flux-cored welding wire for high-nitrogen armor steel suitable for all-position welding. Background technique: [0002] Armored vehicles such as main battle tanks are assault weapons for ground operations. In the course of performing tasks in the field, damage and damage will inevitably occur. It is necessary to repair the damaged areas in a timely and rapid manner to ensure that the inherent capabilities of the equipment can be fully utilized. The demand for field repair puts forward higher requirements for welding consumables for repairing high-nitrogen armored steel for armored vehicles, not only to meet the mechanical performance requirements of new high-nitrogen armored steel, but also to fully consider the characteristics of field welding repair. [0003] The new generation of arm...

AI Technical Summary

Problems solved by technology

However, there is currently no self-shielding flux-cored wire for all-position welding of high-nitrogen armor steel, which limits the development of field repair technology for new-generation armor equipment to a certain extent.